CN107973955A - A kind of high tenacity, inexpensive polyethylene filler parent granule and preparation method thereof - Google Patents
A kind of high tenacity, inexpensive polyethylene filler parent granule and preparation method thereof Download PDFInfo
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- CN107973955A CN107973955A CN201610948540.1A CN201610948540A CN107973955A CN 107973955 A CN107973955 A CN 107973955A CN 201610948540 A CN201610948540 A CN 201610948540A CN 107973955 A CN107973955 A CN 107973955A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
Abstract
The invention discloses a kind of high tenacity, inexpensive polyethylene filler parent granule and preparation method thereof, it is by polyethylene reclaimed materials, low density polyethylene (LDPE), maleic anhydride inoculated polypropylene wax, inorganic mineral filler, 2,5 dimethyl 2,5 pairs of (tert-butyl peroxy base) hexanes, antioxidant, lubricants, gained is prepared through mixing, extruding.The present invention solves the problems such as the of high cost of Conventional filler master batch, bad dispersibility, poor compatibility currently on the market, while extends the use scope of regenerated plastics.Filler parent granule after the invention working process can be used for being widely used in the filling-modified of the materials such as automobile, pipeline, cable, and can significantly be modified raw material in the case where meeting properties of product requirement reduces cost, improves the use value of regenerated plastics.
Description
Technical field
The invention belongs to field of compound material, and in particular to one kind high tenacity, low cost made of polyethylene reclaimed materials
Polyethylene filler parent granule and preparation method thereof.
Background technology
The correlated performances such as mechanical performance, density for reinforced plastic material, typically add a little modifying agent to its into
Row is modified, originally modifying plastics directly use powder at filling-modified aspect, and this modification mode on the one hand can be to production environment
There is larger pollution, the addition of another aspect powder is poor at scattered aspect, influences final products performance.In recent years, as plastics change
The continuous renewal and development of property technology, using filler parent granule as the filling-modified production form for becoming many enterprises,
Effective improvement is obtained in terms of pollution and processing technology.
At present, the base-material that the substantial amounts of filler parent granule of in the market mainly uses is virgin material polyethylene, polyolefin elastomer (POE)
Deng higher in terms of the cost of raw material of production.And master batch production is filled using regenerated plastics as base-material, then it is equipped with phase
The auxiliary agent answered, can not only effectively reduce the cost of raw material, and it is female to obtain the good filling of dispersion performance, compatibility
Grain, can be widely used in modifying plastics industry, such as automobile, pipeline, cable.
The content of the invention
It is an object of the invention to provide the polyethylene filling of a kind of high tenacity made of polyethylene reclaimed materials, low cost
Master batch and preparation method thereof.
To achieve the above object, the technical solution adopted by the present invention is：A kind of high tenacity, the polyethylene filling of low cost are female
Grain, it is prepared by weight by following components：
The polyethylene reclaimed materials be after recycling through sorting, cleaning, crushing, drying obtained injection grade polyethylene, its
Moisture content is less than 3% less than 0.5%, combustion residue, and melt index is 15-60g/10min under the conditions of 2.16kg/230 DEG C.
The melt index of the low density polyethylene (LDPE) is 50~60g/10min under the conditions of 2.16kg/230 DEG C.
Grafting rate >=1% of the maleic anhydride inoculated polypropylene wax.
The inorganic mineral filler is the one or more in talcum powder, calcium carbonate or mica, the mesh of its particle diameter >=3000.
The antioxidant is four [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters (1010) and 6-
The just pungent sulfenyl -1,3,5- triazines (antioxidant 565) of (4- hydroxyl -3,5- di-t-butyls phenylamino) -2,4- two are 1 in mass ratio:4
Compounded.
The lubricant is that White Mineral Oil, ethylene bis stearamide (EBS) and calcium stearate are 2 in mass ratio:1:1 carries out
Compounding.
Another goal of the invention of the present invention is to provide a kind of method for preparing above-mentioned polymer-filled master batch, including following
Step：
(1) by the polyethylene reclaimed materials of drying process, low density polyethylene (LDPE), maleic anhydride inoculated polypropylene wax, antioxygen
Agent, lubricant are poured into temperature control high-speed mixer by formula rate mixes 2-3min；The temperature of the mixer is 75 DEG C -90
DEG C, rotating speed 500-800r/min；
(2) inorganic mineral filler is added, the double (tert-butyl peroxies of 2,5- dimethyl -2,5- are uniformly added into whipping process
Base) after hexane, continue to be stirred 10-15min, obtain premix；
(3) L/D=44 is put into premix:In 1 double screw extruder, after first preheating 2~4 minutes, then through molten
Melt, extrude, vacuumizing, is air-cooled, pelletizing and drying, i.e., obtained filler parent granule, wherein double screw extruder temperature setting are：Melt in advance
140~155 DEG C of area, the first 190~200 DEG C of melting zone, the first 200~210 DEG C of shear at high temperature area, the second shear at high temperature area 210
~220 DEG C, the second 200~210 DEG C of warm area of melting, discharge port 190~200 DEG C of warm area of melting；Process double screw extruder
Rotating speed be 300~500 revs/min.
The present invention has following advantages compared with prior art：
(1) present invention adds maleic anhydride inoculated polypropylene wax in polyethylene reclaimed materials, material is had high polarity
And reactivity, greatly improve the compatibility of polyethylene and mineral filler；
(2) on the one hand polyethylene reclaimed materials can be significantly increased in double (tert-butyl peroxy base) hexanes of 2,5- dimethyl -2,5-
The degree of cross linking, increase composition melt index, improve combination physics characteristic；Another aspect and maleic anhydride inoculated polypropylene wax,
Collective effect reaches combines closely with polymer, significantly improves intensity, cohesion, dispersion performance of material etc., finally makes
Obtained master batch has good dispersiveness, compatibility；
(3) purpose that the present invention adds low density polyethylene (LDPE) is the viscosity of melt when adjusting melting extrusion, makes melt dispersion
It is good, it is uniformly mixed, broken strip when solving extrusion, stop up the problems such as die head.
(4) the special antioxidant formed is mixed in the present invention with antioxidant 565 using antioxidant 1010, its dosage is only
0.01-0.02 parts, greatly reduce the dosage of antioxidant, and common antioxidant dosage minimum 0.5% or so；And can protected material
During production, processing and final use thermal oxidative degradation does not occur for material, so as to maintain the mechanical property of material well.
(5) present invention solves the of high cost of Conventional filler master batch, bad dispersibility, poor compatibility etc. currently on the market and asks
Topic, while extend the use scope of regenerated plastics.Filler parent granule after the invention working process can be used for being widely used in vapour
The materials such as car, pipeline, cable it is filling-modified, meet properties of product requirement in the case of can significantly be modified raw material reduction into
This, improves the use value of regenerated plastics.
Embodiment
With reference to embodiment, the invention will be further described, following embodiments be only that the present invention will be described rather than
It is limited.
It is 1 in mass ratio by antioxidant 1010 and antioxidant 565 that antioxidant, which is,:4 carry out compounding composition.
It is 2 in mass ratio by White Mineral Oil, ethylene bis stearamide (EBS) and calcium stearate that the lubricant, which is,:1:1 into
Row compounding composition.
Polyethylene reclaimed materials is selected after recycling through sorting, cleaning, crushing, drying obtained injection grade polyethylene, it contains
It is 15-60g/10min under the conditions of 2.16kg/230 DEG C that water rate is less than 3%, melt index less than 0.5%, combustion residue.
Embodiment 1
By polyethylene reclaimed materials 10 parts, 10 parts low density polyethylene (LDPE)s, maleic anhydride inoculated polypropylene waxes, 5 parts, antioxidant
0.01 part, 1.6 parts of lubricant be put into temperature control high-speed mixer and mix 2min, temperature control is at 80 DEG C, rotating speed 700r/min；So
In 85 parts of addition high-speed mixers of inorganic mineral filler calcium carbonate, it will stir afterwards while be uniformly added into 2,5- dimethyl -2,
Double 1.7 parts of (tert-butyl peroxy base) hexanes of 5-, high mixer rotating speed are controlled in 750r/min, are continued to stir 12min after adding, are obtained pre-
Batch mixing；Premix is finally fed into L/D=44:In 1 double screw extruder, preheating is after 3 minutes, then through melting, extruding, taking out
Vacuum, air-cooled, pelletizing and drying, that is, be made filler parent granule, and each area's temperature of wherein double screw extruder is：Pre- 140 DEG C of tabetisol,
First 195 DEG C of melting zone, the first 205 DEG C of shear at high temperature area, the second 210 DEG C of shear at high temperature area, the second 205 DEG C of warm area of melting, goes out
Material mouth melts 195 DEG C of warm area, and screw speed is 350 revs/min.
It is 25 in mass ratio by filler parent granule obtained above and polyethylene：75 mixed after again through melting, extruding
Composite material.
Embodiment 2
By polyethylene reclaimed materials 13 parts, 20 parts low density polyethylene (LDPE)s, maleic anhydride inoculated polypropylene waxes, 2 parts, antioxidant
0.02 part, 3 parts of lubricant be put into temperature control high-speed mixer and mix 3min, temperature control is at 75 DEG C, rotating speed 600r/min；Then
By in 30 parts of 55 parts of inorganic mineral filler calcium carbonate, talcum powder addition high-speed mixers, double (the tertiary fourth mistakes of 2,5- dimethyl -2,5-
Epoxide) 1.6 parts of hexane, the control of high mixer rotating speed continues to stir 15min after adding, obtains premix in 650r/min；Finally will
In premix feeding double screw extruder, preheating is after 2 minutes, then through melting, extruding, vacuumizing, air-cooled, pelletizing and drying,
Filler parent granule is made, each area's temperature of wherein double screw extruder is：Pre- 155 DEG C of tabetisol, the first 200 DEG C of melting zone, first
210 DEG C of shear at high temperature area, the second 220 DEG C of shear at high temperature area, the second 210 DEG C of warm area of melting, discharge port 200 DEG C of warm area of melting, spiral shell
Bar rotating speed is 400 revs/min.
It is 25 in mass ratio by filler parent granule obtained above and polyethylene：75 mixed after again through melting, extruding
Composite material.
Embodiment 3
By polyethylene reclaimed materials 15 parts, 30 parts low density polyethylene (LDPE)s, maleic anhydride inoculated polypropylene waxes, 5 parts, antioxidant
0.01 part, 2.5 parts of lubricant be put into temperature control high-speed mixer and mix 3min, temperature control is at 90 DEG C, rotating speed 800r/min；So
In 45 parts of 35 parts of inorganic mineral filler mica powder, talcum powder addition high-speed mixers, it will stir afterwards while be uniformly added into 2,
Double 1.5 parts of (tert-butyl peroxy base) hexanes of 5- dimethyl -2,5-, high mixer rotating speed control in 800r/min, continue to stir after adding
12min, obtains premix；Finally premix is fed in double screw extruder, preheating is after 3 minutes, then through melting, extruding,
Vacuumize, is air-cooled, pelletizing and drying, i.e., obtained filler parent granule, each area's temperature of wherein double screw extruder are：Pre- tabetisol 140
DEG C, the first 190 DEG C of melting zone, the first 200 DEG C of shear at high temperature area, the second 210 DEG C of shear at high temperature area, the second 200 DEG C of warm area of melting,
Discharge port melts 190 DEG C of warm area, and screw speed is 300 revs/min.
It is 25 in mass ratio by filler parent granule obtained above and polyethylene：75 mixed after again through melting, extruding
Composite material.
Embodiment 4
By polyethylene reclaimed materials 20 parts, 10 parts low density polyethylene (LDPE)s, maleic anhydride inoculated polypropylene waxes, 5 parts, antioxidant
0.02 part, 1.5 parts of lubricant be put into temperature control high-speed mixer and mix 3min, temperature control is at 75 DEG C, rotating speed 600r/min；So
In 75 parts of addition high-speed mixers of inorganic mineral filler talcum powder, it will stir afterwards while be uniformly added into 2,5- dimethyl -2,
Double 1.5 parts of (tert-butyl peroxy base) hexanes of 5-, high mixer rotating speed are controlled in 500r/min, are continued to stir 10min after adding, are obtained pre-
Batch mixing；Finally premix is fed in double screw extruder, preheating is after 2 minutes, then through melting, extruding, vacuumizing, it is air-cooled,
Pelletizing and drying, that is, be made filler parent granule, and each area's temperature of wherein double screw extruder is：Pre- 145 DEG C of tabetisol, the first melting zone
200 DEG C, the first 205 DEG C of shear at high temperature area, the second 215 DEG C of shear at high temperature area, the second 205 DEG C of warm area of melting, discharge port melting temperature
195 DEG C of area, screw speed are 500 revs/min.
It is 25 in mass ratio by filler parent granule obtained above and polyethylene：75 mixed after again through melting, extruding
Composite material.
Embodiment 5
By polyethylene reclaimed materials 16 parts, 10 parts low density polyethylene (LDPE)s, maleic anhydride inoculated polypropylene waxes, 4 parts, antioxidant
0.02 part, 2 parts of lubricant be put into temperature control high-speed mixer and mix 2min, temperature control is at 90 DEG C, rotating speed 500r/min；Then
By in 30 parts of 50 parts of inorganic mineral filler calcium carbonate, mica powder addition high-speed mixers, stir while being uniformly added into 2,5-
Double 1.6 parts of (tert-butyl peroxy base) hexanes of dimethyl -2,5-, high mixer rotating speed control in 600r/min, continue to stir after adding
13min, obtains premix；Finally premix is fed in double screw extruder, preheating is after 2 minutes, then through melting, extruding,
Vacuumize, is air-cooled, pelletizing and drying, i.e., obtained filler parent granule, each area's temperature of wherein double screw extruder are：Pre- tabetisol 150
DEG C, the first 200 DEG C of melting zone, the first 205 DEG C of shear at high temperature area, the second 220 DEG C of shear at high temperature area, the second 205 DEG C of warm area of melting,
Discharge port melts 195 DEG C of warm area, and screw speed is 450 revs/min.
It is 25 in mass ratio by filler parent granule obtained above and polyethylene：75 mixed after again through melting, extruding
Composite material.
Embodiment 6
By polyethylene reclaimed materials 14 parts, 10 parts low density polyethylene (LDPE)s, maleic anhydride inoculated polypropylene waxes, 6 parts, antioxidant
0.01 part, 2.8 parts of lubricant be put into temperature control high-speed mixer and mix 3min, temperature control is at 85 DEG C, rotating speed 650r/min；So
In 80 parts of addition high-speed mixers of inorganic mineral filler mica powder, it will stir afterwards while be uniformly added into 2,5- dimethyl -2,
Double 1.7 parts of (tert-butyl peroxy base) hexanes of 5-, high mixer rotating speed are controlled in 550r/min, are continued to stir 14min after adding, are obtained pre-
Batch mixing；Finally premix is fed in double screw extruder, preheating is after 4 minutes, then through melting, extruding, vacuumizing, it is air-cooled,
Pelletizing and drying, that is, be made filler parent granule, and each area's temperature of wherein double screw extruder is：Pre- 145 DEG C of tabetisol, the first melting zone
195 DEG C, the first 210 DEG C of shear at high temperature area, the second 215 DEG C of shear at high temperature area, the second 200 DEG C of warm area of melting, discharge port melting temperature
195 DEG C of area, screw speed are 400 revs/min.
It is 25 in mass ratio by filler parent granule obtained above and polyethylene：75 mixed after again through melting, extruding
Composite material.
Above-described embodiment 1-6 composite materials prepared are molded into batten through standard, its performance is as shown in table 1.
At the same time by it is existing 230 DEG C melt index is 40~100g/10min in the case of 2.16Kg polyethylene and useless
(moisture content is less than 3% to old polyethylene laundry machine barrel reclaimed materials less than 0.5%, combustion residue, and melt index is in 2.16kg/230
It is 15-60g/10min under the conditions of DEG C) as comparative example, equally it is molded into batten and detects its performance, it is as shown in table 1 below.
The test method difference of wherein each physical property is as follows：
Melt flow rate (MFR) is tested according to GB/T 3682-2000
Tensile strength, elongation at break are measured according to GB/T 1040.2-2006；
Bending strength, bending modulus are measured according to GB/T 9341-2008；
Izod notched impact strength is measured according to GB/T 1834-2008；
Load deformation temperature is measured according to GB/T 1634.2-2004；
Table 1：Performance indicator：
Polyethylene filler parent granule is made using the application it can be seen from embodiment in upper table 1 and comparative example result to fill
For the composite material formed after polyethylene compared with commercial polyethylene or polyethylene reclaimed materials, it has more preferable rigidity, toughness, by force
Degree and heat resistance, it also has a clear superiority in terms of compatibility, dispersiveness, and particularly bending modulus has obtained significantly carrying
Rise.The regrown material source selected additionally, due to the present invention is wider, and simple production process, greatly saves the cost of raw material.
These embodiments are merely to illustrate the present invention and should not limit the scope of this invention.In addition, reading this hair
After the bright content, those skilled in the art make the present invention change or modification of various equivalent forms, such equivalent forms
Also belong to following claims limited range.
Claims (8)
- A kind of 1. polyethylene filler parent granule of high tenacity, low cost, it is characterised in that：Its prepared by weight by following components and Into：10~20 parts of polyethylene reclaimed materials；10~30 parts of low density polyethylene (LDPE)；2~6 parts of maleic anhydride inoculated polypropylene wax；75~85 parts of inorganic mineral filler；Double 1.5~1.7 parts of (tert-butyl peroxy base) hexanes of 2,5- dimethyl -2,5-；0.01~0.02 part of antioxidant；1.5~3 parts of lubricant.
- 2. polyethylene filler parent granule according to claim 1, it is characterised in that：The moisture content of the polyethylene reclaimed materials It is less than 3% less than 0.5%, combustion residue, its melt index is 15-30g/10min under the conditions of 2.16kg/230 DEG C.
- 3. polyethylene filler parent granule according to claim 1, it is characterised in that：The melt index of the low density polyethylene (LDPE) It is 50 ~ 60g/10min under the conditions of 2.16kg/230 DEG C.
- 4. polyethylene filler parent granule according to claim 1, it is characterised in that：The maleic anhydride inoculated polypropylene wax Grafting rate >=1%.
- 5. polyethylene filler parent granule according to claim 1, it is characterised in that：The inorganic mineral filler is talcum One or more in powder, calcium carbonate or mica, the mesh of its particle diameter >=3000.
- 6. polyethylene filler parent granule according to claim 1, it is characterised in that：The antioxidant for four [β-（3,5- bis- uncles Butyl -4- hydroxy phenyls）Propionic acid] pentaerythritol ester and 6- (4- hydroxyl -3,5- di-t-butyls phenylamino) just pungent sulphur of -2,4- two Base -1,3,5- triazines are 1 in mass ratio:4 are compounded.
- 7. polyethylene filler parent granule according to claim 1, it is characterised in that：The lubricant is White Mineral Oil, ethylene Bis-stearamides and calcium stearate are 2 in mass ratio:1:1, which carries out compounding, forms.
- A kind of 8. preparation method of polyethylene filler parent granule as claimed in claim 1, it is characterised in that：Comprise the following steps：（1）By the polyethylene reclaimed materials of drying process, low density polyethylene (LDPE), maleic anhydride inoculated polypropylene wax, antioxidant, profit Lubrication prescription is poured into temperature control high-speed mixer by formula rate and mixes 2-3min；The temperature of the mixer is 75 DEG C -90 DEG C, rotating speed For 500-800r/min；（2）Add inorganic mineral filler, be uniformly added into whipping process 2,5- dimethyl -2,5- double (tert-butyl peroxy bases) oneself After alkane, continue to be stirred 10-15min, obtain premix；（3）L/D=44 are put into premix:In 1 double screw extruder, after first preheating 2~4 minutes, then through melting, squeezing Go out, vacuumize, is air-cooled, pelletizing and drying, i.e., obtained filler parent granule, wherein double screw extruder temperature setting are：Pre- tabetisol 140 ~155 DEG C, the first 190~200 DEG C of melting zone, the first 200~210 DEG C of shear at high temperature area, the second shear at high temperature area 210~220 DEG C, the second 200~210 DEG C of warm area of melting, discharge port 190~200 DEG C of warm area of melting；The rotating speed of process double screw extruder For 300~500 revs/min.
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Cited By (2)
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| CN111040300A (en) * | 2019-12-26 | 2020-04-21 | 上海涵点科技有限公司 | Functional master batch capable of enabling PP (polypropylene) material to be free of flame treatment and preparation method and application thereof |
| CN112920494A (en) * | 2021-02-05 | 2021-06-08 | 保定风帆美新蓄电池隔板制造有限公司 | Method for preparing regenerated substance by using waste PE (polyethylene) partition plate of lead-acid storage battery |
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